JPS6347130Y2 - - Google Patents

Description

[Detailed explanation of the idea]

INDUSTRIAL APPLICATION FIELD The present invention relates to a vehicle air conditioner that can independently adjust the temperature on the front seat side and the rear seat side in a vehicle interior. Prior Art A conventional vehicle air conditioner that can independently adjust the temperature on the front seat side and the rear seat side of the vehicle interior is the structure disclosed in Japanese Patent Application No. 57-100284. something is proposed. In this vehicle air conditioner, each seat side air passage is independently formed to communicate with a front seat side air outlet and a rear seat side air outlet provided in the vehicle interior. In this air passageway on each seat side, the amount of heating of the cooled air is changed depending on the opening degree.
A front air mix door and a rear air mix door are provided to control the temperature of the blowing air. The front air mix door is controlled by a first temperature control means that operates based on a setting signal output from the temperature setting device, and the rear air mix door is controlled by a second control means. The second control means is adapted to operate based on a control signal that includes a proportional change of the control signal of the first temperature control means. In other words, in the vehicle interior, the temperature of the air blown from the front seat side inevitably affects the temperature of the rear seat side, so if the temperature is controlled independently for the front seat side and the rear seat side, the front seat side and It is not possible to obtain an independent room temperature for the rear seat side. Therefore, as described above, by operating the second control means based on a control signal that includes a signal that is proportionally changed from the control signal of the first temperature control means, it is possible to control the airflow from the front seat side on the rear seat side. This allows the set temperature to be maintained while taking into account the influence of temperature. As described above, in the conventional vehicle air conditioner, the temperature of the blowing air on the rear seat side is set by considering only the influence of the blowing air temperature on the front seat side. However, in reality, whether the harmonized air on the front seat side comes from the defroster outlet pointing upwards in the passenger compartment or from the vent outlet pointing toward the rear,
Depending on the air outlet mode, such as whether the air outlet is from a floor air outlet pointing downward, the degree of influence on the rear seat side differs significantly. That is, depending on the difference in the air outlet mode, the ratio of the airflow volume between the front and rear seats and the airflow in the vehicle interior change, and accordingly, the temperature difference between the front and rear seats also changes. Therefore, with a device that corrects the temperature of the air blown out on the rear seat side by simply considering the air temperature blown out on the front seat side, it is not possible to maintain the desired set temperature independently and accurately on the front seat side and the rear seat side. , which is difficult in practice. Purpose of the invention The present invention was made in view of the actual situation of the conventional vehicle air conditioning system. The purpose of the present invention is to provide an air conditioner for a vehicle that can accurately maintain a preset temperature independently in the front and rear of a vehicle interior in practical use by controlling the air conditioner in accordance with the air outlet mode as well as the air outlet mode. That is. Structure of the invention In order to achieve the above-mentioned purpose, the present invention has the following features:
The main body of the air conditioner has multiple air outlets on the front seat side of the vehicle interior, as well as an unusual air outlet on the rear seat side, and can freely change the air outlet mode to select the air outlet on the front seat side. It has a temperature setting device and a temperature sensor,
Front seat side temperature control that controls the temperature of air blown out from the front seat side air outlet based on a control signal including a signal set by the front seat side temperature setting device and a sensor signal detected by the temperature sensor. means, which are linked to the front seat side temperature control means and the rear seat side temperature setter, so that the rear seat temperature setting signal set by the rear seat side temperature setter and the front seat side temperature control means are changed proportionally. A rear seat temperature control means for controlling the temperature of air blown out from the rear seat outlet based on a rear seat temperature control signal including a control signal, and a front seat side outlet mode conversion means for detecting the front seat outlet mode conversion of the air conditioner main body. and a correction means for correcting the signal level of the rear seat control means based on this detection signal, so that the set value level can be maintained on the rear seat side without being affected by changes in the front seat side air outlet mode. It is set as. Embodiment An embodiment of the present invention will be described below with reference to the drawings. That is, as shown in FIG. 1, the air conditioner main body 11 is provided with a blower fan 12 that introduces and transfers air into the main body 11.
An evaporator 13 as a cooling source and a heater core 14 as a heating source are disposed downstream of the blower fan 12. On the downstream side of the heater core 14, a front seat side air passage 16 and a rear seat side air passage 17 are defined by a partition plate 15.
A communication hole 19 is provided with a switching door 18 . Both air passages 16 and 17 are provided with front and rear air mix doors 2 that control the amount of air passing through the heater core 14 and the amount of detouring air depending on the degree of opening.
0 and 21 are provided. Also, front seat side air passage 1
6 has a defroster outlet 22 and a belt outlet 2.
3. Front seat side air outlets such as the floor air outlet 24 are formed, and each air outlet has doors 22a, 23a, 2
4a is provided. Further, a rear seat air outlet 25 is provided in the rear seat side air passage 17. Further, the front air mix door 20 is linked with a front seat side temperature control means 26, and the rear seat side air mix door 21 is linked with a rear seat side temperature control means 26.
7 are linked. Both control means 26, 27
are provided with negative pressure actuators 28 and 29 having cylinders 28a and 29a, and the negative pressure actuators 28 and 29 convert negative pressure controlled by double vacuum solenoid valves 30 and 31 into displacement. , each air mix door 20,2
Equipped with a function to adjust the opening degree of 1. Further, the front seat side temperature control means 26 includes a negative pressure actuator 28.
A front feedback potentiometer 32 is provided for detecting the displacement of the front end by converting it into a resistance value. The front feedback potentiometer 32 has a function of taking out feedback potential signals 32a and 32b, and one signal 32a is input to the front autoamplifier 33. The front auto amplifier 33 receives, in addition to the front feedback potential signal 32a, a sensor signal from an outside air sensor 34 that detects the outside temperature, a sensor signal from an inside air sensor 35 that detects the temperature inside the vehicle, and a sensor signal from a temperature setting device 36. temperature setting signal is input, and the double vacuum solenoid valve 3
It has the function of making a judgment and issuing an instruction to output an activation signal as described later to the 0. Furthermore, a mode detector 37 is provided in the front seat side temperature control passage 16. The mode detector 37 includes each air outlet 2 outputted from the front auto amplifier 33.
Signals corresponding to the states of Nos. 2, 23, and 24, that is, an air outlet mode signal, are input. On the other hand, the rear seat side temperature control means 27 is provided with a rear feedback potentiometer 38 that converts the displacement of the negative pressure actuator 29 into a resistance value and detects it. The signal of the rear feedback potential 38 is the same as that of the front feedback potential 3.
It is input to the rear auto amplifier 39 together with the other signal 32b of No. 2 (terminals, ,,).
The rear auto amplifier 39 further includes an actuation signal (terminal) for the switching door switch for rotating the switching door 18, a setting signal (terminal,) for the rear seat temperature setting device 41, and the mode detector 3.
7 mode detection signal (terminal) is input, and the double vacuum solenoid valve 3
1 has a function of making judgments and issuing commands to output actuation signals as will be described later. In addition, 42 in the figure
is the operating switch for the air conditioner. Figure 2 shows the rear auto amplifier 39.
In the circuit configuration shown in FIG. or each of the above-mentioned terminals. That is, the valve 31
a, 31b (terminal), a transistor 43,
44 are connected, and the transistors 43, 4
4 includes a comparator 45 for comparing input potentials A and B;
46 are provided. The terminal (connected to the changeover door switch 40) is also provided with a relay 47 serving as a correction means, and the relay 47 is provided with a changeover door switch contact 49 having a fixed contact FS. Furthermore, a relay 4 serving as a correction means is connected to the terminal (connected to the mode detector 37).
8 are connected, and the relay 48 has mode switch contacts 50a, 50 each having a respective fixed contact VH.
It is equipped with b. The fixed contact HH has a resistor of 5
1a and 51b, and a grounded resistor 52 is provided at the fixed contact F of the changeover door switch contact 49. Furthermore, comparators 45, 4
A resistor 53 having the same resistance value as the resistor 52 is inserted between the resistor 6 and the terminal. In this embodiment having the above configuration, the temperature of the conditioned air in the front seat side air passage 16 in which the front seat side air outlets 22, 23, and 24 are provided is controlled as follows. In other words, the front seat side temperature setting device 3
According to 6, the temperature set by the front seat occupant is
It is expressed as a resistance value and becomes a setting signal. On the other hand, the outside air temperature sensor 34 and the inside air temperature sensor 35 output sensor signals according to changes in outside air temperature and indoor temperature. Then, the front auto amplifier 33 compares the resistance value of the front feedback potentiometer 32 interlocked with the front air mix door 20, that is, the feedback potential signal 32a, with the set temperature and sensor signal, and determines the predetermined temperature. A judgment is made and a command signal is output to the double vacuum solenoid valve 30. The double vacuum solenoid valve 30 operates solenoid valves 30a, 3 according to a command signal from the front auto amplifier 33.
0b is activated to switch to a negative pressure source and supply negative pressure to the negative pressure actuator 28. The negative pressure actuator 28 changes the opening degree of the front air mix door 20 by converting negative pressure into a displacement (change in length) amount. At the same time, the front feedback potentiometer 32 which is interlocked with the front air mix door 20 is activated by the feedback signal 32a.
The front auto amplifier 33 is informed of the position (opening degree) of the front air mix door 20. Therefore, the conditioned air whose temperature corresponds to the position (opening degree) of the front air mix door 20 is supplied to the air outlets 22 and 2.
3 and 24, it is blown out to the front seats in the vehicle interior. On the other hand, the temperature of the conditioned air in the rear seat side air passage 17 in which the rear seat air outlet 25 is provided is controlled as follows. In other words, the potential at point A in Figure 2 is
Total resistance value of resistor 53 and feedback signal 32b of front feedback potential 32
Determined by R _A. Also, the potential at point B is
It is determined by the resistance connection states shown in (i), (ii), and (iii) below, which change depending on the contact states of the relays 47 and 48. (i) When the diverter door switch 40 is on and the relay 47 is activated, the diverter door switch contact 49 is activated.
is connected to contact F, the total resistance of the rear feedback potentiometer 38 and the resistor 53 (R _B1 ). (ii) Since the changeover door switch 40 is off, the relay 47 is Off and mode switch 5
When 0a and 50b are connected to contact V (the state shown in the second figure), the total resistance of the rear feedback potentiometer 38 and the set resistance of the rear seat side temperature setting device 41 (referred to as R _B2 ) . (iii) In the state of (ii), when the relay 48 is activated by the air outlet mode detector 37 and the mode switches 50a and 50b are connected to the contact H, the rear feedback potentiometer 38 and the rear seat side temperature are The total resistance value of the setting resistance of the setting device 41 and the resistances 51a and 51b (assumed to be R _B3 ). On the other hand, the comparators 45 and 46 have input potentials A and B.
The following (),
It operates as shown in () and (). () When A>B, the output of the comparator 45 becomes high level, switching the transistor 43 and operating the solenoid valve 31a connected to the terminal. () When A<B, the output of the comparator 46 becomes high level, switching the transistor 44 and operating the solenoid valve 31b connected to the terminal. () When A=B, the outputs of both comparators 45 and 46 become low level, and solenoid valve 3
Both 1a and 31b are turned off. Note that the input potentials A and B are the resistance values R _A ,
Determined by the values of R _B1 , R _B2 , and R _B3 . Therefore, the operation of the double vacuum solenoid valve 31 shown in (), (), and () above depends on the resistance values R _A and R _B1 ,
It is controlled by the rear seat side control signal based on the balance between the resistances of R _A and R _B2 and R _A and R _B3 . Further, the rear air mix door 21 is driven by the operation of the double vacuum solenoid valve 30 on the front seat side, as in the case of the front air mix door 20, by the operation of the negative pressure actuator 29.
The conditioned air is supplied through the rear air mix door 21.

[Table] (a) When the changeover door switch 40 is turned on The changeover door 18 closes the rear seat side air passage 17 as shown by the broken line in FIG. Therefore, the conditioned air on the rear seat side air passage 17 side enters the front seat side air passage 16 through the communication hole 19, and the entire air volume is blown out to the front seat side. At this time, R _A = R ₅₃ + R _fp , Rθ = R ₅₂ + R _rp , R ₅₃ =
Since R ₅₂ , the rear air mix door 21 stops when R _rp =R _fp . Therefore, the opening degree of the rear air mix door 21 = the opening degree of the front air mix door 20, and the conditioned air passing through the communication hole 19 and flowing into the front seat side air passage 16 flows through the front air mix door 20. The temperature is the same as the air conditioned by Therefore, conditioned air can be obtained from each of the air outlets 23, 24, and 25 to maintain the temperature of the front seat side of the vehicle interior asymptotically at the set temperature. (b) When the changeover door switch 40 is off The changeover door 18 closes the communication hole 19 as shown by the solid line in FIG. 1, and the conditioned air passes through the front seat side air passage 16 and the rear seat side air passage 17. , is blown out to the front seat side and the rear seat side of the vehicle interior. At this time, when the front seat side air outlet is set to a vent blowing mode in which conditioned air is blown only from the vent air outlet 23, the air outlet mode detector 37 detects this and inputs a predetermined signal to the relay 48. This causes the relay 48 to operate and energize the mode switches 50a and 50b into contact with the contact point V. And mode switch 50
When a and b are in contact with contact point V, R _B = R _rp +
Since Rθ, the rear air mix door 21 stops when _Rrp = R _fp + R ₅₃ −Rθ. Furthermore, when the heater blowout mode is changed to blow out conditioned air only from the floor blowout outlet 24, the relay 48 is activated in the same manner as described above, and the mode switch 50 is activated.
Bring a and b into contact with contact H. As a result, R _B = R _rp + Rθ + R51 _a + R51 _b ,
When R _rp = R _fp + R ₅₃ −Rθ−R51 _a −R51 _b , the rear air mix door 21 stops. That is, even if the set value Rθ of the rear seat side temperature setting device 41 is the same, the opening degree of the rear air mix door 21 is corrected by the resistors 51a and 51b as the blowing mode is changed. Therefore, even if the front seat occupant freely changes the air outlet mode, the rear seat occupant will not be affected by the change in the air outlet mode and will continue to maintain the rear seat side at the desired room temperature. It is possible. In the above embodiment, the rear air mix door 21 is corrected and controlled in accordance with the change in the air outlet mode, but the opening degree of the switching door 18 is controlled to adjust the relative airflow volume on the front and rear seats. It is also possible to maintain the temperature of the rear seat side room temperature by changing the temperature. Further, in the above embodiment, only the vehicle interior temperature was controlled, but in the case of a vehicle air conditioner equipped with a humidifier, the vehicle interior temperature is controlled, and the temperature is controlled according to the change in the front seat side air blowing mode. It is also possible to correct the rear seat side humidification and maintain the rear seat side cabin humidity constant. Effects of the invention As explained above, the present invention has a front seat side temperature setting means and a rear seat side temperature setting means, and the temperature can be freely adjusted independently on the front seat side and the rear seat side in the vehicle interior. In the vehicle air conditioner, the signal level of the rear seat control means is corrected as the front seat side air outlet mode is changed. Therefore, even if you change the front seat side airflow mode when the front seats are performing independent air conditioning, the rear seat side will not be affected by changes in the airflow ratio between the front and rear seats or the airflow in the cabin Room temperature can be kept constant. Furthermore, the set temperature of the rear seat temperature setting device and the rear seat room temperature can be made to match regardless of the front seat air outlet mode, thereby improving usability.

[Brief explanation of drawings]

FIG. 1 is a schematic overall view showing one embodiment of the present invention, and FIG. 2 is a main configuration diagram of a control circuit for operating a rear air mix door having a correction means according to this embodiment. 11...Air conditioner main body, 16...Front seat side air passage, 17...Rear seat side air passage, 20...Front air mix door, 21...Rear air mix door, 22...Defroster outlet , 23... Vent air outlet, 24... Floor air outlet, 25... Rear seat air outlet, 26... Front seat side temperature control means, 27...
... Rear seat side temperature control means, 28, 29 ... Negative pressure actuator, 30, 31 ... Double vacuum solenoid valve, 32 ... Front feedback potentiometer, 33 ... Front auto amplifier,
34...Outside air sensor, 35...Inside air sensor, 36
...Front seat side temperature setting device, 37...Air outlet mode detector, 38...Rear feed back potentiometer,
39... Rear auto amplifier, 40... Changeover door switch, 41... Rear seat side temperature setting device, 47, 48
...Relay (correction means), 51a, 51b...Resistor.

Claims (1)

[Scope of utility model registration request] An air conditioner main body that has multiple air outlets on the front seat side of the vehicle interior and different air outlets on the rear seat side, and can freely change the air outlet mode to select the air outlet on the front seat side, and the front seat. It has a side temperature setting device and a temperature sensor, and air is blown from the front seat side air outlet based on a control signal including a signal set by the front seat side temperature setting device and a sensor signal detected by the temperature sensor. a front-seat temperature control means for controlling the temperature of the air in the air; and a rear-seat temperature setting signal that is linked to the front-seat temperature control means and the rear-seat temperature setter and is set by the rear-seat temperature setter. and a rear seat temperature control means for controlling the temperature of the air blown out from the rear seat air outlet based on a rear seat temperature control signal including a control signal proportionally changed from the front seat temperature control means; and the air conditioner main body. 1. A vehicle air conditioner comprising: a correction means for detecting a front seat side air outlet mode conversion of the air conditioner and correcting a signal level of the rear seat control means based on this detection signal.